Monitoring the nutritional and reproductive state of dairy cows through the presence of urea in milk

Grande, Paula Adriana; Santos, Geraldo Tadeu dos; Ribeiro, Hilton Manoel Dias; Damasceno, Júlio César; Alcalde, Claudete Regina; Barbosa, Orlando Rus; Horst, José Augusto; Santos, Fabio Seiji dos

doi:10.1590/s1516-89132009000700032

Cited by 4 publications

(4 citation statements)

References 25 publications

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“…[ 13 ]. A higher percentage of milk fat could reflect a higher amount of energy that cows are getting from the feed, reducing the production of MUN [ 23 ]. Rumen microbes consume rumen energy and protein to form microbial protein.…”

Section: Discussionmentioning

confidence: 99%

Exploring factors associated with bulk tank milk urea nitrogen in Central Thailand

Kananub¹,

Jawjaroensri²,

VanLeeuwen³

et al. 2018

Vet World

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Aim:The study was to determine seasonal fluctuations and non-nutritional factors associated with bulk tank milk urea nitrogen(BTMUN).Materials and Methods:A total of 58,364 BTM testing records were collected from 2364 farms in Central Thailand during September 2014-August 2015. Using square root BTMUN as the outcome, other milk components, farm effect, and sampling time were analyzed by univariable repeated measures linear regression, and significant variables were included in multivariable repeated measures linear regression.Results:The average BTMUN (standard deviation) was 4.71 (±1.16) mmol/L. In the final model, BTM fat and protein percentages were associated with BTMUN as quadratic and cubic polynomials, respectively. BTM lactose percentage and the natural logarithm of somatic cell counts were negatively linearly associated with BTMUN. At the farm level, the BTM lactose association was negatively linear; herd BTMUN decreased following an increase of herd lactose average, and BTM lactose slopes were quite different among farms as well. Sampling time had the highest potency for the estimation of BTMUN over time, with lows and highs occurring in August and October, respectively. The variation in test level BTMUN was decreased by 18.6% compared to the null model, and 6% of the variance could be explained at the farm level.Conclusion:The results clarify seasonal variation in BTMUN and the relationships among other BTM constituents and BTMUN, which may be useful for understanding how to manage lactating dairy cattle better to keep BTM constituents within normal ranges.

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Section: Discussionmentioning

confidence: 99%

Exploring factors associated with bulk tank milk urea nitrogen in Central Thailand

Kananub¹,

Jawjaroensri²,

VanLeeuwen³

et al. 2018

Vet World

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“…Therefore, the reduction in milk lactose must be more studied. Milk urea nitrogen (MUN) is a useful parameter to predict the nutritional and reproductive stages of dairy cows (Grande et al 2009). The average values of N-urea in milk usually range from 12-18 mg/dl ).…”

Section: Discussionmentioning

confidence: 99%

Production, Composition, Fatty Acids Profile and Stability of Milk and Blood Composition of Dairy Cows Fed High Polyunsaturated Fatty Acids Diets and Sticky Coffee Hull

Santos

Schogor

Romero

et al. 2014

Braz. arch. biol. technol.

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“…The main physiological factors affecting milk properties include age at first calving, lactation stage, calving order, and cow age, with milk production generally increasing as cows get older . Grande et al (2009) argued that lactation stage is the main physiological factor associated with variations in milk composition.…”

Section: Introductionmentioning

confidence: 99%

Physicochemical and sensory characteristics of milk from cows in different lactation stages and calving orders

Barreto

Rangel

Spyrides

et al. 2016

SCA

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Knowledge of the variation in milk composition is essential for determining milk quality, which is defined by several organoleptic properties. This study evaluated the effect of lactation stage and calving order on the physicochemical composition and sensory characteristics of milk from primiparous and multiparous lactating dairy cows. Milk samples were collected monthly from December 2011 to May 2012. Data were analyzed using ANOVA followed by Tukey's test (p < 0.05). Milk production (PROD), somatic cell count (SCC), and milk urea nitrogen (MUN) were significantly higher in multiparous cows, whereas the casein to total protein ratio (C/TP) was significantly higher in primiparous cows. All milk components except for non-fat dry solids (NDE) were significantly affected by lactation stage. Body condition score (BCS) was not affected by calving order or lactation stage. Color was the only sensory attribute affected by calving order. In conclusion, the physicochemical properties and sensory attributes of milk were affected by calving order and lactation stage. Key words: Lactation stage. Milk quality. Primiparous. Multiparous. ResumoO conhecimento da variação na composição do leite é essencial para determinar sua qualidade, a qual é definida por várias propriedades organolépticas. Este estudo avaliou o efeito do estágio de lactação e ordem de parto sobre a composição físico-química e as características organolépticas do leite de vacas leiteiras primíparas e multíparas. As amostras de leite foram coletadas mensalmente no período de dezembro de 2011 a maio de 2012. Os dados foram analisados por meio de análise de variância (ANOVA), seguida pelo teste de Tukey (p <0,05). A produção de leite (PROD), contagem de células somáticas (CCS) e nitrogênio ureico no leite (NUL) foram significativamente mais elevados em vacas multíparas, ao passo que a caseína e sua proporção na proteína total do leite (C/PT) foi significativamente mais elevada em vacas primíparas. Todos os componentes do leite foram significativamente afetados pela fase de lactação, exceto para os sólidos não gordurosos (SNG). Escores de condição corporal (ECC) não foram afetados pela ordem de parto ou estágio de lactação. A cor foi o único atributo sensorial afetado pela ordem de parto. Em conclusão, as propriedades físico-químicas e sensoriais do leite atributos foram afetadas pela ordem de parto e estágio de lactação. Palavras-chave: Dias em leite. Primíparas. Multíparas.

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Monitoring the nutritional and reproductive state of dairy cows through the presence of urea in milk

Abstract: The effects of farm, parity (PO)

Cited by 4 publications

References 25 publications

Exploring factors associated with bulk tank milk urea nitrogen in Central Thailand

Exploring factors associated with bulk tank milk urea nitrogen in Central Thailand

Production, Composition, Fatty Acids Profile and Stability of Milk and Blood Composition of Dairy Cows Fed High Polyunsaturated Fatty Acids Diets and Sticky Coffee Hull

Physicochemical and sensory characteristics of milk from cows in different lactation stages and calving orders

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